Ars Technica heeft een behoorlijk diep artikel gebakken over de architectuur van de AMD Athlon en Motorola G4. Beide processors blijken erg veel met elkaar gemeen te hebben en combineren elementen uit de traditionele RISC en CISC wereld. Hier een hap uit de intro:
Throughout this article, I'll emphasize the fact that regardless of marketing spin, stone-age controversies between platform factions, and general hysteria surrounding the terms "RISC" and "CISC", the K7 and the G4 are remarkably similar. They face similar problems, and they solve them in similar ways. The majority of the differences between these two CPUs are not the result of any sort of fundamental difference between "RISC" or "CISC" design philosophies -- most of the K7's CISC baggage is taken care of in its front end, and the back ends of both CPUs are fully post-RISC designs. Rather, their differences stem from perfectly ordinary design tradeoffs of the kind all engineers and architects make, tradeoffs that involve price, power dissipation, performance, speed, support for legacy technology, and a whole host of other considerations. AMD's K7 and Motorola's MPC7400 (the unit which, when paired with a particular chipset, becomes known as the G4) are, in fact, cousins with common ancestry.